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Distance relay in distribution substation to work in high accuracy what should be the Overhead Power Transmission Lines gauge along it?

Overhead Power Transmission Lines may suffer a many faults in its work time, the distance relay can Determined the approximate distance where the fault happened.

Electrical Electrical Maintenance Electricity
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Question added by WAEL Ismaeel , Maintenance Unit manager , North-Refineries-Company(NRC)
Date Posted: 2017/09/05
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Sebastian Deaconu
by Sebastian Deaconu , Mentenance electrical engineer , National Transport Company in Electricity

The remote relay operates in several impedance adjustment steps. The impedance depends on the length of the line, and it is set on the relay, allowing a wide range of values ​​and pushing to protect medium lines and long lines. Stage I usually covers 80% of the line length with a 0s delay, the other steps being progressively delayed. Usually the last step is the one that sees behind the line to the power station with a second-order delay.

mohammed nurislam
by mohammed nurislam , general electrical engineer , Abdul Rahman Al Otaishan & Sons Group L .L. C

Overhead Power Transmission lins may suffer a many fault in its working time.

The Distance relay can Determined that the Approximate Distance where is the fault happend.

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